Turns out there was a .js conflict with the Pogstone Module (drupal). Removing this module fixed the issue.
– Cullen McGoughSep 14 '15 at 14:13

Glad you fixed it! Odd that a JS conflict caused this symptoms, WSoD is usually a PHP conflict. Do you mean Pogstone's Fancy Tokens?Might be worth reporting against the extension or CiviCRM to help get the conflict fixed. Should you want to contribute further you can offer to sponsor the work.
– Chris BurgessSep 15 '15 at 19:16